ESP32-S3 Wake Word Voice Control Kit with ESP32 + Relay
ESP32-S3 Wake Word Voice Control Kit – Build a Relay That Listens Without the Cloud
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Command a light, fan, or any appliance using your voice — with zero internet connectivity. This kit guides you through building a completely edge-based voice trigger, using the ESP32-S3's neural network accelerator to detect a custom wake word like “Hey Compoden” and instantly toggle a relay. No cloud, no Wi‑Fi, just pure on‑device intelligence that responds the moment you speak.
What You'll Build
A fully functional voice‑activated relay module that springs into action the moment it hears your designated wake word. The relay closes, the indicator LEDs show the state, and the entire system runs offline — perfect for privacy‑conscious home automation, assistive devices, or IoT prototypes that must work without a network.
What You'll Learn
- Train a custom wake word using ESP‑SR and deploy it on the ESP32‑S3 neural network
- Interface an INMP441 I2S MEMS microphone for low‑noise audio capture
- Drive a 5V relay with flyback diode protection for safe appliance control
- Process real‑time audio and run inference entirely on the edge using ESP‑NN
Kit Contents
| Component | Quantity |
|---|---|
| ESP32-S3 Dev Board | 1 |
| INMP441 I2S Mic | 1 |
| 5V Relay Module | 1 |
| 5mm LED | 3 |
| 1N4007 Diode | 3 |
| 4.7kΩ Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| Micro USB Cable | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
CBSE Class 11‑12 students diving into IoT and embedded systems, B.Tech ECE/EEE undergraduates prototyping automation projects, Smart India Hackathon participants who need a privacy‑preserving voice interface, and ATL Tinkering Lab mentors looking for a ready‑to‑assemble module that demonstrates real edge AI.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the box to chat with your AI companion, trained specifically on this wake‑word relay project. For additional help, our team is available on WhatsApp within hours.
Can I use the kit to switch AC appliances directly?
Yes. The included 5V relay is rated for AC loads up to 250V at 10A. Always wire the 1N4007 flyback diode and follow the safety guidelines we provide for high‑voltage connections.
Do I need to code the wake word detection from scratch?
No. We supply ready‑to‑upload Arduino sketches and a Python script that converts your recorded wake word sample into an ESP‑SR compatible model — no low‑level DSP coding required.
Is the wake word truly offline or does it use cloud speech-to-text?
Everything runs locally on the ESP32‑S3’s neural network accelerator. The audio from the INMP441 mic never leaves the chip, so the kit works perfectly with zero internet access.
ESP32-S3 WakeNet detects a custom wake word offline. Triggers relay on detection without cloud.
What's in this kit
- ESP32-S3 Dev Board
- INMP441 I2S Mic
- 5V Relay Module
- 5mm LED x3
- 1N4007 Diode x3
- 4.7kΩ Resistors x5
- 400-pt Breadboard
- M-M Wires x20
- Micro USB Cable
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items